{"id":14781,"date":"2023-02-01T15:25:45","date_gmt":"2023-02-01T13:25:45","guid":{"rendered":"https:\/\/www.thegreenbow.com\/?post_type=resource&#038;p=14781"},"modified":"2023-02-13T18:17:08","modified_gmt":"2023-02-13T16:17:08","slug":"proteger-les-communications-avant-le-logon-windows","status":"publish","type":"resource","link":"https:\/\/www.thegreenbow.com\/fr\/ressource\/proteger-les-communications-avant-le-logon-windows\/","title":{"rendered":"Prot\u00e9ger les communications avant le logon Windows"},"content":{"rendered":"\n<div class=\"wp-block-ch-resource-content alignfull\">\n<p><strong>Auteur : Arnaud Dufournet<\/strong>, Chief Marketing Officer<\/p>\n\n\n\n<p>Deux entreprises fran\u00e7aises sur cinq consid\u00e8rent la cybers\u00e9curit\u00e9 comme leur principal d\u00e9fi en mati\u00e8re de t\u00e9l\u00e9travail selon la derni\u00e8re \u00e9tude d\u2019Okta (<a href=\"https:\/\/www.okta.com\/fr\/resources\/hybrid-work-report-2023\/\">Enqu\u00eate Okta Hybrid Work 2023<\/a>). Les RSSI redoutent non seulement le manque de contr\u00f4le et de maitrise sur ces postes de travail qui sortent des locaux de l\u2019entreprise mais aussi le d\u00e9veloppement des pratiques \u00e0 risques. Et ils ont raison de s\u2019inqui\u00e9ter car un internaute sur deux avoue utiliser des \u00e9quipements informatiques personnels \u00e0 des fins professionnelles. C\u2019est ce que nous a appris la derni\u00e8re <a href=\"https:\/\/clusif.fr\/etude-menaces-informatiques-pratiques-securite-2022\/\">\u00e9tude MIPS 2022<\/a> r\u00e9alis\u00e9e par le Clusif. Ce chiffre est en hausse par rapport \u00e0 l\u2019\u00e9tude pr\u00e9c\u00e9dente. Inversement, l\u2019usage des \u00e9quipements professionnels \u00e0 des fins personnelles est aussi une r\u00e9alit\u00e9.<\/p>\n\n\n\n<p>L\u2019ANSSI le rappelait encore dans un guide paru en octobre 2022 \u00e0 destination des TPE\/PME (<a href=\"https:\/\/www.ssi.gouv.fr\/uploads\/2021\/02\/anssi-guide-tpe_pme.pdf\">La Cybers\u00e9curit\u00e9 pour les TPE\/PME en 13 questions<\/a>)&nbsp;: maitriser le risque num\u00e9rique en situation de nomadisme n\u00e9cessite d\u2019installer un \u00ab&nbsp;logiciel de connexion \u00e0 distance de type VPN chiffr\u00e9 afin de prot\u00e9ger les communications&nbsp;\u00bb. Mais aussi de sensibiliser les collaborateurs aux bons r\u00e9flexes.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Connaissez-vous le Mode GINA ?<\/h2>\n\n\n\n<p>Il est demand\u00e9 aux utilisateurs d\u2019ouvrir un tunnel VPN d\u00e8s lors qu\u2019ils ont ouvert une session Windows et commencent \u00e0 travailler, c\u2019est-\u00e0-dire acc\u00e9der \u00e0 des applications web ou bien des documents stock\u00e9s sur le r\u00e9seau de l\u2019entreprise. L\u2019ANSSI recommande vivement une configuration du VPN (<em>mode full-tunnelling<\/em>) permettant de faire passer l\u2019int\u00e9gralit\u00e9 des flux dans un tunnel IPsec afin de garantir la protection des donn\u00e9es. Mais encore faut-il que l\u2019activation du VPN soit bien r\u00e9alis\u00e9e par les utilisateurs d\u00e8s le d\u00e9but de leur session Windows et non pas simplement lorsqu\u2019ils ont besoin d\u2019acc\u00e9der \u00e0 un document particulier stock\u00e9 sur le r\u00e9seau de l\u2019entreprise.<\/p>\n\n\n\n<div class=\"wp-block-media-text alignwide has-media-on-the-right is-stacked-on-mobile\" style=\"grid-template-columns:auto 39%\"><div class=\"wp-block-media-text__content\">\n<p>Les RSSI ne peuvent pas \u00eatre derri\u00e8re chaque utilisateur pour s\u2019assurer qu\u2019ils utilisent convenablement leur client VPN. Tous les t\u00e9l\u00e9travailleurs ne sont pas conscients que la protection et la confidentialit\u00e9 de leurs communications et des donn\u00e9es qu\u2019ils \u00e9changent, ne sont actives que lorsqu\u2019ils pensent \u00e0 d\u00e9marrer leur VPN.<\/p>\n<\/div><figure class=\"wp-block-media-text__media\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"670\" src=\"https:\/\/www.thegreenbow.com\/wp-content\/uploads\/2023\/02\/Teletravail_lite-1024x670.jpeg\" alt=\"\" class=\"wp-image-14830 size-full\" srcset=\"https:\/\/www.thegreenbow.com\/wp-content\/uploads\/2023\/02\/Teletravail_lite-1024x670.jpeg 1024w, https:\/\/www.thegreenbow.com\/wp-content\/uploads\/2023\/02\/Teletravail_lite-300x196.jpeg 300w, https:\/\/www.thegreenbow.com\/wp-content\/uploads\/2023\/02\/Teletravail_lite-768x502.jpeg 768w, https:\/\/www.thegreenbow.com\/wp-content\/uploads\/2023\/02\/Teletravail_lite-1536x1005.jpeg 1536w, https:\/\/www.thegreenbow.com\/wp-content\/uploads\/2023\/02\/Teletravail_lite-100x65.jpeg 100w, https:\/\/www.thegreenbow.com\/wp-content\/uploads\/2023\/02\/Teletravail_lite.jpeg 1790w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n\n<p><\/p>\n\n\n\n<p>C\u2019est la raison pour laquelle nous pensons chez TheGreenBow que la mise en \u0153uvre de cette protection doit \u00eatre la plus simple possible. C\u2019est en partant de ce postulat que nous avons d\u00e9velopp\u00e9 la fonctionnalit\u00e9 appel\u00e9e \u00ab\u00a0<strong>mode GINA<\/strong>\u00a0\u00bb disponible sur le Client VPN Windows Enterprise.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Qu&rsquo;est-ce que le Mode GINA ?<\/strong><\/h2>\n\n\n\n<p>Dissipons tout de suite un doute pour les cin\u00e9philes\u00a0; GINA ne fait aucunement r\u00e9f\u00e9rence \u00e0 une c\u00e9l\u00e8bre actrice italienne disparue il y a quelques jours. La signification est en r\u00e9alit\u00e9 un peu moins glamour. GINA est l\u2019acronyme de \u00ab\u00a0Graphical identification and authentification \u00bb. Apparu \u00e0 partir de Windows 2000, il s\u2019agit d\u2019un module de l&rsquo;interface utilisateur de Windows qui g\u00e8re la fonction d&rsquo;identification et d&rsquo;authentification de l&rsquo;utilisateur lors de l&rsquo;ouverture d\u2019une session. Il a \u00e9t\u00e9 remplac\u00e9 \u00e0 partir de Windows Vista et\u00a0Windows Server 2008 par l\u2019API Microsoft Credential Providers.<\/p>\n\n\n\n<p>C\u2019est sur cette API que s\u2019appuie le mode \u00ab\u00a0GINA\u00a0\u00bb du Client VPN Windows Enterprise afin de permettre la mont\u00e9e d\u2019un tunnel IPsec avant m\u00eame l\u2019ouverture d\u2019une session Windows par l\u2019utilisateur.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Quels sont les avantages du Mode GINA ?<\/strong><\/h2>\n\n\n\n<p>L\u2019ouverture d\u2019un tunnel juste avant l\u2019ouverture d\u2019une session Windows pr\u00e9sente deux avantages majeurs permettant de renforcer la s\u00e9curit\u00e9 du endpoint.\u00a0 Le premier est d\u2019abord l\u2019authentification\u00a0: un utilisateur au moment o\u00f9 il se connecte \u00e0 un serveur de gestion des droits d\u2019acc\u00e8s (comme l\u2019Active Directory) qui se trouve dans le r\u00e9seau de l\u2019organisation, va devoir s\u2019authentifier. \u00c0 noter que le mode GINA fonctionne \u00e9galement avec d\u2019autres syst\u00e8mes d\u2019authentification support\u00e9s par le Client VPN Windows comme des cartes \u00e0 puce.<\/p>\n\n\n\n<p>Deuxi\u00e8mement, le contr\u00f4leur de domaine va ensuite mettre \u00e0 jour les profils de s\u00e9curit\u00e9 du poste ainsi que les applications, en particulier le pare-feu. Cette \u00e9tape est tr\u00e8s importante pour assurer la conformit\u00e9 du poste.<\/p>\n\n\n\n<p>Si en plus l\u2019organisation suit la recommandation de l\u2019ANSSI et a d\u00e9ploy\u00e9 une configuration \u00ab&nbsp;tout dans le tunnel&nbsp;\u00bb pour ses clients VPN, alors c\u2019est l\u2019assurance que tous les flux sortants mais aussi entrants sur le poste passent par la passerelle et les fourches caudines du pare-feu. Ainsi, avant m\u00eame que la session Windows ne s\u2019ouvre, le poste de travail se retrouve comme dans une \u00ab&nbsp;bulle&nbsp;\u00bb s\u00e9curis\u00e9e, sans que l\u2019utilisateur ne s\u2019en rende compte. Il peut ensuite acc\u00e9der \u00e0 des documents sur le r\u00e9seau ou bien \u00e0 des services internet en b\u00e9n\u00e9ficiant du chiffrement des communications.<\/p>\n\n\n\n<p>Le mode GINA une fois coupl\u00e9 \u00e0 d\u2019autres fonctionnalit\u00e9s comme la d\u00e9tection automatique du r\u00e9seau de confiance (TND) et le mode Always-On, permet de r\u00e9pondre aux exigences de s\u00e9curit\u00e9 sans demander d\u2019effort aux utilisateurs car le tunnel se monte automatiquement et uniquement quand cela est n\u00e9cessaire.<\/p>\n\n\n\n<div class=\"wp-block-media-text alignwide is-stacked-on-mobile\" style=\"grid-template-columns:35% auto\"><figure class=\"wp-block-media-text__media\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1008\" src=\"https:\/\/www.thegreenbow.com\/wp-content\/uploads\/2023\/02\/Voleur-de-PC_Lite-1024x1008.jpeg\" alt=\"\" class=\"wp-image-14835 size-full\" srcset=\"https:\/\/www.thegreenbow.com\/wp-content\/uploads\/2023\/02\/Voleur-de-PC_Lite-1024x1008.jpeg 1024w, https:\/\/www.thegreenbow.com\/wp-content\/uploads\/2023\/02\/Voleur-de-PC_Lite-300x295.jpeg 300w, https:\/\/www.thegreenbow.com\/wp-content\/uploads\/2023\/02\/Voleur-de-PC_Lite-768x756.jpeg 768w, https:\/\/www.thegreenbow.com\/wp-content\/uploads\/2023\/02\/Voleur-de-PC_Lite-100x98.jpeg 100w, https:\/\/www.thegreenbow.com\/wp-content\/uploads\/2023\/02\/Voleur-de-PC_Lite.jpeg 1459w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure><div class=\"wp-block-media-text__content\">\n<p>Dernier avantage du mode GINA\u00a0: en cas de vol d\u2019un PC d\u2019un collaborateur, le voleur a priori ne connait pas les identifiants pour ouvrir une session Windows. Le tunnel qui permet d\u2019acc\u00e9der au r\u00e9seau de l\u2019entreprise ne pourra donc pas \u00eatre mont\u00e9 et le voleur n\u2019aura pas acc\u00e8s aux informations stock\u00e9es sur le r\u00e9seau. De son c\u00f4t\u00e9, l\u2019entreprise peut d\u00e9truire la session emp\u00eachant ainsi toute possibilit\u00e9 d\u2019acc\u00e8s au r\u00e9seau via le VPN.<\/p>\n<\/div><\/div>\n\n\n\n<p><\/p>\n\n\n\n<p>Si vous souhaitez tester la derni\u00e8re version du Client VPN Windows Enterprise et le mode GINA, rendez-vous sur la <a href=\"https:\/\/store.thegreenbow.com\/boutique\/windows\/client-vpn-windows-enterprise-7\/\" target=\"_blank\" rel=\"noreferrer noopener\">Boutique en ligne TheGreenBow<\/a>. Vous pouvez \u00e9galement nous faire part de vos projets en nous contactant directement <a href=\"https:\/\/www.thegreenbow.com\/fr\/contact\/\">ici<\/a>.<\/p>\n\n\n\n<p><\/p>\n\n\n\n  <section  class=\"wp-block-acf-linked-pages  section-content linked-pages-section\"  itemprop=\"hasPart\" itemscope itemtype=\"https:\/\/schema.org\/WebPageElement\">\n    <div class=\"grid-container\">\n     <div class=\"grid-x grid-padding-x align-center mobile-slider\">\n                <div class=\"cell medium-4 article\">\n            <div class=\"wrapper\">\n              \n                              <a  href=\"https:\/\/www.thegreenbow.com\/fr\/contact\/\" >\n\n                                          <figure>\n                        <img decoding=\"async\"  data-fade-in loading=\"lazy\" src=\"data:image\/png;base64,R0lGODlhAQABAAD\/ACwAAAAAAQABAAACADs=\" data-lazy-interchange=\"[https:\/\/www.thegreenbow.com\/wp-content\/uploads\/2022\/11\/Discuter_lite-727x486.jpeg, small], [https:\/\/www.thegreenbow.com\/wp-content\/uploads\/2022\/11\/Discuter_lite-301x201.jpeg, medium], [https:\/\/www.thegreenbow.com\/wp-content\/uploads\/2022\/11\/Discuter_lite-343x229.jpeg, large], [https:\/\/www.thegreenbow.com\/wp-content\/uploads\/2022\/11\/Discuter_lite-1454x972.jpeg, retina], [https:\/\/www.thegreenbow.com\/wp-content\/uploads\/2022\/11\/Discuter_lite-602x402.jpeg, medium_retina], [https:\/\/www.thegreenbow.com\/wp-content\/uploads\/2022\/11\/Discuter_lite-686x458.jpeg, large_retina]\" data-interchange-sizes=\"{&quot;small&quot;:{&quot;w&quot;:727,&quot;h&quot;:486},&quot;medium&quot;:{&quot;w&quot;:301,&quot;h&quot;:201},&quot;large&quot;:{&quot;w&quot;:343,&quot;h&quot;:229},&quot;retina&quot;:{&quot;w&quot;:1454,&quot;h&quot;:972},&quot;medium_retina&quot;:{&quot;w&quot;:602,&quot;h&quot;:402},&quot;large_retina&quot;:{&quot;w&quot;:686,&quot;h&quot;:458}}\"  alt=\"Prot\u00e9ger les communications avant le logon Windows\" itemprop=\"image\" data-fade-in \/>\n                      <\/figure>\n                    \n                                      <h4 class=\"block-title\">Une question \u00e0 nous poser sur le mode GINA ?<\/h4>\n                  \n                  \n                <\/a>\n              \n            <\/div>\n          <\/div>\n\n                  <div class=\"cell medium-4 article\">\n            <div class=\"wrapper\">\n              \n                              <a  href=\"https:\/\/store.thegreenbow.com\/boutique\/windows\/client-vpn-windows-enterprise-7\/\" >\n\n                                          <figure>\n                        <img decoding=\"async\"  data-fade-in loading=\"lazy\" src=\"data:image\/png;base64,R0lGODlhAQABAAD\/ACwAAAAAAQABAAACADs=\" data-lazy-interchange=\"[https:\/\/www.thegreenbow.com\/wp-content\/uploads\/2022\/08\/Windows-Enterprise-7-2-727x486.jpeg, small], [https:\/\/www.thegreenbow.com\/wp-content\/uploads\/2022\/08\/Windows-Enterprise-7-2-301x201.jpeg, medium], [https:\/\/www.thegreenbow.com\/wp-content\/uploads\/2022\/08\/Windows-Enterprise-7-2-343x229.jpeg, large], [https:\/\/www.thegreenbow.com\/wp-content\/uploads\/2022\/08\/Windows-Enterprise-7-2-1366x913.jpeg, retina], [https:\/\/www.thegreenbow.com\/wp-content\/uploads\/2022\/08\/Windows-Enterprise-7-2-602x402.jpeg, medium_retina], [https:\/\/www.thegreenbow.com\/wp-content\/uploads\/2022\/08\/Windows-Enterprise-7-2-686x458.jpeg, large_retina]\" data-interchange-sizes=\"{&quot;small&quot;:{&quot;w&quot;:727,&quot;h&quot;:486},&quot;medium&quot;:{&quot;w&quot;:301,&quot;h&quot;:201},&quot;large&quot;:{&quot;w&quot;:343,&quot;h&quot;:229},&quot;retina&quot;:{&quot;w&quot;:1366,&quot;h&quot;:913},&quot;medium_retina&quot;:{&quot;w&quot;:602,&quot;h&quot;:402},&quot;large_retina&quot;:{&quot;w&quot;:686,&quot;h&quot;:458}}\"  alt=\"Prot\u00e9ger les communications avant le logon Windows\" itemprop=\"image\" data-fade-in \/>\n                      <\/figure>\n                    \n                                      <h4 class=\"block-title\">D\u00e9couvrir le client VPN Windows Enterprise<\/h4>\n                  \n                  \n                <\/a>\n              \n            <\/div>\n          <\/div>\n\n        \n\t\t<\/div>\n    <\/div>\n  <\/section>\n<\/div>\n","protected":false},"featured_media":14784,"template":"","meta":{"_acf_changed":false,"resource_type":"internal"},"resource_category":[30],"class_list":["post-14781","resource","type-resource","status-publish","has-post-thumbnail","hentry","resource_category-blog"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - 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